Sealing device



C. E. EVANS SEALING DEVICE Aug. 28, 1988.

Filed Nov. ll, 1936 R O T. N E V m ATTORNEY.

Ill

Patcnted Aug.. 23, 1938 PATENT OFFICE SEALING DEVICE Charles E. Evans, Council Bluffs, Iowa, assignor of one-fourth to L. G. Howard, Council Bluffs,

Iowa

Application November 11, 1936, Serial No. 110,293

3 Claims.

sealed. In exhausting the air from the container i any suitable vacuum used.

It is therefore an important object of my invention to provide sealing means of this character whereby air may be exhausted from the container.

Another object of my invention is to provide a device of this Character whereby a positive seal may be eifected.

Another object is to provide a device of this character wherein the seal maybe readily broken when it is desired to open the container to which the sealing means is' attached.

Another object is to provide a device of this character having means for looking the seal.

A still further object is to provide a device of this Character of simple and durable construction and of lowmanufacturing cost.

Numerous other objects and advantages of this invention will be apparent as it is better understood from the following description, which, taken in connection with the aocompanying drawing, discloses a preferred embodiment thereof.

Referring to the drawing:

Figure 1 is a Vertical sectional view through the sealing means attached to the top of a glass jar with the valve-like stopper loosely received in the opening of the cover so that air may be exhausted from the jar.

Figure 2 is a Vertical sectional view through the sealing means attached to the top of a glass jarshowing the stopper after same has been pressed downwardly 'into the opening of the -cov'er to form a secure seal with the shoulder of the=stoppump mechanlsm may be per locked below the rim` of the fiange of the opening.

Figure 3 is a plan view 'of the device. Figure 4 is a side elevational view of the stopper. i

Figure 5 is an end elevational view of the same. Figure 6 is an under plan view of the stopper. Referring more particularlyto the drawing, which illustrates a preferred embodiment of the invention, reference numeral l indicates a jar, the top portion onlyof which is shown. The upper end of the jar is threaded and a metal cover is screwed thereon. In Figure 1 the cover is screwed lightly onto the top of the jar. Two annular seals of rubber or other suitable material are provided, numbered |2 and |3 respectively, between the jar and the cover. The cover I i is shown screwed tightly onto the jar in Figure 2 wherein the seals |2 and |3 are compressed between the cover and the jar. While two annular rubber seals are shown, either one or the other may be used separately if desired. The cover ll is provided with a central opening having a downwardly and inwardly inclined fiange 14. Within the opening there is a stopper IS of rubber or other suitable material, the sides of said stopper tapering downwardly and inwardly at substantially the same angle as the fiange H of the cover. The lower end of the stopper is provided with outwardly or laterally extending arms IB to limit the outward or upward movement thereof and spaced upwardly of said arms there is an annular shoulder ll on the stopper.

Any suitable vacuum pump means may be em- I -I4 so that the stopper may freely rise and fall to act as a valve, the shoulder seating on the inner surface of the flange to prevent air returning into the jar. After the air is exhausted from the jar the stopper is pressed inwardly or downwardly until the shoulder l'l thereof is below the lower end of the flange which it engages to form a secure seal as shown in Figure 2.

To break the seal the stopper is pulled upwardly until the shoulder I'l is disengaged from the lower end of the flange and thereby permittlng the air to enter the jar. The cover may be then readily unscrewed from the jar It is thought that the invention and many of its attendant advantages will be understood from the foregoing description and it will be apparent that various changes may be made in the form, construction, and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its 'material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

Having thus described my invention what I claim is:

1. In a device of the class described, the combination of a oontainer. a cover secured thereon and having an opening therein, a downwardly and inwardly inclined flange about the opening, a tapered stopper adapted to be operativeiy received in the flanged opening, outwardly extending arms on said stopper adiacent the inner end thereof, and a shoulder about the stopper in upwardly spaced relation to said arms, said shoulder being above the lower edge of the fiange during exhaustion of air from the container and adapted to be forced below said lower edge in seaiing and looking association therewith after the air has been exhausted from said container.

2. In a device of the class described, the combination of a container having a cover secured thereon, said cover having a flanged opening therein, the flange extending in a downwardiy and inward taper, a tapered stopper adapted to be operably received in the flanged opening, means for normally limiting the upward movement of the stopper, and means for seallngly engaging the inner edge of the fiange of the cover opening when the stopper is pressed inwardly in said opening, said means being normaliy above the inner edge of the fiange during evacuation of air from the container.

3. In a device of the class described, a vacuum container having an opening therein tapering inwardiy from the outer side of said container, a tapered stopper operably received in said opening, laterally extending means on the inner end of the stopper adapted to limit the outward movement of said stopper, and means on said stopper adapted for sealing engagement with the inner edge of the opening when said stopper is fully pressed into said opening, said last mentloned means being normally outside said inner edge of said opening. v

' CHARLES E. EVANS. 

